32. The 20th century brought still more,among them the airplane,the use of aluminum,mass production of automobiles,radio,television, various electric household products,computers and high-tech products. The production capacity in terms of scale and efficiency makes USA the only super power in the world today. 32. The 20th century brought still more, among them the airplane, the use of aluminum, mass production of automobiles, radio, television, various electric household products, computers and high-tech products. The production capacity in terms of scale and efficiency makes USA the only super power in the world today